Properties of the Number 19161

Nineteen Thousand One Hundred Sixty-One

Basics

Value: 19160 → 19161 → 19162

Parity: odd

Prime: No

Previous Prime: 19157

Next Prime: 19163

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 2129

Divisors: 1, 3, 9, 2129, 6387, 19161

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101011011001

Octal: 45331

Duodecimal: B109

Hexadecimal: 4ad9

Square: 367143921

Square Root: 138.42326394071193

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Partial sums of A000009 (partitions into distinct parts). A36469

Number of emergent parts in all partitions of n. A182699

Recurrence sequence based on positions of digits in decimal places of γ, the Euler-Mascheroni constant. A98321

T(n,k) = Number of (n+1) X (k+1) 0..2 arrays x(i,j) with row sums ∑_j=1..k+1 x(i,j) nondecreasing, and column sums ∑_i=1..n+1 i·x(i,j) nondecreasing. A233117

Number of partitions of n having depth 2; see Comments. A237750

The 360 degree spoke (or ray) of a hexagonal spiral of Ulam. A244803

Number of vertices formed in a square by straight line segments when connecting the four corner vertices to the points dividing the sides into n equal parts. A355949

Numbers that are the same upside down (using only digits 0, 1, 6 and 9). A169731

Denominators of continued fraction convergents to fifth root of 5. A2363

Number of (w,x,y,z) with all terms in {1,...,n} and w <= harmonic mean of {x,y,z}. A212104